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*-----------------------------------------------------------------------
* Filename: dm6L6.inc V2 12/10/97
* Simulator: PSpice
* Device type: Power beam tetrode
* Device model: 6L6 (and variants)
*
* Author: Duncan Munro
* Date: 4/6/97
* Copyright: (C)1997-2000 Duncan Amplification
*
* V2 [12/10/97]: Screen current limited to prevent screen current
* draw at Vs = 0.
*
* The following parameters are not modelled:
*
* (1) Heater
* (2) Grid current is an approximation
*
* Please note that this model is provided "as is" and
* no warranty is provided in respect of its suitability
* for any application.
*
* This model is provided for educational and non-profit use.
*
* Email queries to postmaster@duncanamps.com
*
* Pins A Anode
* S Screen
* G Grid
* K Cathode
*
*-----------------------------------------------------------------------.SUBCKT 6L6 A S G K
*
* Calculate contribution to cathode current
*
Eat at 0 VALUE={0.636*ATAN(V(A,K)/5)}
Eme me 0 VALUE={PWR(LIMIT{V(A,K),0,2000},1.5)/1750}
Emu mu 0 VALUE={PWRS(V(G,K),1-(LIMIT{-V(G,K),30,9999}-30)/2000)}
Egs gs 0 VALUE={LIMIT{V(A,K)/2.5+V(S,K)*15.15+V(mu)*134,0,1E6}}
Egs2 gs2 0 VALUE={PWRS(V(gs),1.5)*0.8E-6}
Ecath cc 0 VALUE={LIMIT{V(gs2)*V(at),0,V(me)}}
*
* Calculate anode current
*
Ga A K VALUE={V(cc)}
*
* Calculate screen current
*
Escrn sc 0 VALUE={0.76*V(gs2)*(1.1-V(at))}
Gs1 S K VALUE={V(sc)*LIMIT{V(S,K),0,10}/10}
*
* Grid current
*
Gg G K VALUE={PWR(LIMIT{V(G,K)+1,0,1E6},1.5)*(1.25-V(at))*650E-6}
*
* Capacitances
*
Cg1 G K 5.0p
Cgs G S 5.0p
Cak A K 6.5p
Cg1a G A 0.6p.ENDS
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